Symbiotic Interactions and Ecosystem Roles of Termites
Summary
Termites sustain one of the most intricate symbiotic systems in the animal kingdom, relying on diverse microbial partners to degrade lignocellulose and recycle nutrients. In lower termites, flagellate protists coordinate with bacterial consortia to hydrolyse cellulose and hemicelluloses, while in higher termites the loss of protists has been offset by specialised bacterial lineages occupying complementary digestive niches. Beyond gut digestion, termites foster defensive mutualisms with actinobacteria in nest material and deploy collective disease defences through social immunity. These interactions underpin soil formation, carbon turnover and nitrogen cycling in tropical and temperate ecosystems. By fragmenting plant litter, enhancing microbial diversity and modulating greenhouse-gas fluxes, termites perform critical ecosystem services, influencing vegetation dynamics, soil structure and nutrient availability on a global scale.
Research from Nature Portfolio
Recent studies have demonstrated that social immunity exerts selective pressure on fungal pathogens, driving the evolution of spore-surface chemistry. Under colony-level grooming, spores reduce key detection cues and produce higher yields of less virulent propagules, thereby evading collective sanitary behaviours and enhancing transmission success.
Experimental work on subterranean termites has revealed that allogrooming transmits low doses of fungal conidia to nestmates, inducing mild infections that boost antioxidant enzyme activities and upregulate immune effectors. Proteomic analyses identify stress-response and signalling proteins as regulators of this active immunisation, illustrating a molecular basis for colony-level disease resistance.
Symbiotic Interactions and Ecosystem Roles of Termites publication trend
The graph below shows the total number of articles in symbiotic interactions and ecosystem roles of termites across all publications each year (not limited to Nature Index journals).
Technical terms
Symbiosis: A close and long-term biological interaction between two different biological organisms, ranging from mutualism to parasitism.
Lignocellulose: A complex of lignin, cellulose and hemicellulose that constitutes the structural framework of plant biomass.
Trophallaxis: The transfer of food or fluids among members of a social insect colony, facilitating nutrient sharing and microbial transmission.
Allogrooming: The cleaning of one individual by another, which in social insects serves to remove pathogens and distribute symbionts.
Nitrogen fixation: The enzymatic conversion of atmospheric nitrogen into ammonia by certain prokaryotes, enriching soil fertility.
References
- Unveiling lignocellulolytic potential: a genomic exploration of bacterial lineages within the termite gut. Microbiome (2024).
- Pathogen evasion of social immunity. Nature Ecology & Evolution (2023).
- Emergence of putative energy parasites within Clostridia revealed by genome analysis of a novel endosymbiotic clade. The ISME Journal: Multidisciplinary Journal of Microbial Ecology (2023).
- Experimental verification and molecular basis of active immunization against fungal pathogens in termites. Scientific Reports (2015).
- Extended disease resistance emerging from the faecal nest of a subterranean termite. Proceedings of the Royal Society B (2013).
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